PNAS:高福/刘金华等报导,近期出现的H1N1猪流感病毒对人类感染力高

2020-07-01 MedSci原创 MedSci原创

人流感疫苗株与G4重症EA H1N1病毒的抗原交叉反应性低,说明已有的群体免疫力不能对G4病毒提供保护。

猪被认为是产生大流行性流感病毒的重要宿主或 "混合容器"。对猪的流感病毒进行系统监测,对于预警和防范下一次潜在的大流行至关重要。

最近,我国研究人员报告了2011年至2018年中国对猪的流感病毒监测情况,并确定了一种最近出现的基因型4(G4)重配型欧亚禽类(EA)H1N1病毒,该病毒带有2009年大流行(pdm/09)和三重重组(TR)衍生的内部基因,自2016年以来在猪群中占主导地位。

与pdm/09病毒类似,G4病毒可以与人型受体结合,并且,其在人的气道上皮细胞中产生的原代病毒要多得多,在雪貂身上表现出高效的感染力和气溶胶传播。

此外,人流感疫苗株与G4重症EA H1N1病毒的抗原交叉反应性低,说明已有的群体免疫力不能对G4病毒提供保护。

进一步在职业暴露人群中进行血清学监测,结果显示,10.4%(35/338)的猪工对G4 EA H1N1病毒呈阳性,尤其是18 ~35岁的参与者,其血清阳性率为20.5%(9/44),这表明以G4 EA H1N1为主的病毒已获得了更强的人体感染力。

这种感染性大大增强了病毒在人类中适应的机会,并引起人们对可能产生大流行病毒的关注。

 

原始出处:

Honglei Sun et al.Prevalent Eurasian avian-like H1N1 swine influenza virus with 2009 pandemic viral genes facilitating human infection, PNAS (2020). DOI: https://doi.org/10.1073/pnas.1921186117

 

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    2020-07-08 huagfeg
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    2020-12-13 drwjr
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    2020-07-03 TZF0806
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    2020-07-03 muzishouyi

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